

.mask-dialog {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .3);
    z-index: 999;
}
.mask-dialog .dialog-them {
    position: absolute;
    left: 50%;
    width: 50%;
    margin-left: -241px;
    margin-top: 145px;
    width: 482px;
    height: 290px;
    background: #FFFFFF;
    border: 1px solid rgba(151, 151, 151, 1);
    border-radius: 6px;
}
.mask-dialog .btn-close .btn-close-img{
    width: 19px;
    height: 19px;
    margin-top: 19px;
    margin-left: 444px;
}
.mask-dialog .dialog-them .explain-operate .gift-img{
    width: 41px;
    height: 45px;
    margin-top: 25px;
    margin-left: 222px;
}
.mask-dialog .dialog-them .explain-gift{
    width: 192px;
    height: 44px;
    margin: 24px 146px;
}
.mask-dialog .dialog-them .explain-win {
    text-align: center;
}
.mask-dialog .dialog-them .btn-next{
    width: 290px;
    height: 50px;
    background-color: black;
    border: 1px solid rgba(151, 151, 151, 1);
    border-radius: 6px;
    margin: 38px 97px;
}
.mask-dialog .dialog-them .btn-next .next-step {
    width: 100%;
    height: 100%;
    line-height: 50px;
    text-align: center;
    background-color: black;
    color: white;
    text-decoration: none;
    border: transparent;
    border-radius: 6px;
}